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Next stop: The red planet

Guests

Mary Roach: New York Times Best-selling author of such works as "Stiff" and "Spook." Her new book is called "Packing for Mars."

Science writer Mary Roach researched what it would take to prepare a settlement on Mars. What she found was that humans would need to rethink nearly everything we take for granted on earth in order to live on the red planet.